"She's not considered a suspect," said Laura Meltzer, a spokeswoman with the Las Vegas Metropolitan Police Department. "She's somebody detectives would like to speak to in connection with this event."

Police say Howard has been identified as being inside a black Range Rover at the time shots were fired from the vehicle. She was described by police as 5 feet 8 inches tall, weighing around 120 pounds and having green eyes and dark hair.

She is listed as a missing and possibly endangered person from the Miami area.

Police consider Harris to be armed and dangerous and say he has an extensive criminal history, CNN affiliate KLAS reported. He has several tattoos, including a small heart -shaped one below his right eye and a large one of an owl that covers his neck and part of his chest.

A woman who said she is Howard's mother told CNN that her daughter and Harris have been girlfriend and boyfriend for about a year.

Miladys Garcia said she recognized Harris from an image that police issued but that she knew him by a different name. Garcia said she hasn't been in contact with her daughter since the shooting.

She provided CNN with a phone number for Howard, who she said was 21 years old, not 22. A call Tuesday went straight to voice mail, and the mailbox was full.

Police have released several photographs of Howard and Harris. They pose together in some; one is identical to the Facebook profile picture of a woman identified as "Yeni Alfonso."

That page says she is from Naranja, Florida, attended Homestead High School in Homestead, Florida, works as an entertainer at Playmates Cabaret and lives in Las Vegas.

A man identified as Emilio Alfonso has posted two messages on her page since Sunday.

"Yeny, call me now," read one in Spanish.

"You've got me worried. Call me. You are very important. Everything has a solution," read the other, also in Spanish.

In the shooting and crash, Kenneth Cherry, an aspiring rapper known as Kenny Clutch, was driving his Maserati around 4:20 a.m. Thursday when someone in a Range Rover shot at his car as it headed north on Las Vegas Boulevard. Cherry, who was shot in the chest and arm, later died at a hospital.

The Maserati continued into the intersection with Flamingo Road and collided with a taxi, which caught fire, killing cab driver Michael Boldon, CNN affiliate KVVU said.

A passenger in the taxi -- identified by the Clark County coroner's office as Sandra Sutton-Wasmund, 48, of Maple Valley, Washington -- also died. Her death and the deaths of Boldon and Cherry have been ruled homicides, according to the coroner's office.

The fire closed a block and a half of the Strip near some of its biggest draws: Caesars Palace, the Bellagio, Bally's and the Flamingo. Police collected surveillance video from the casinos.